TMATMUL_BIAS

指令示意图

TMATMUL_BIAS tile operation

简介

带偏置加法的矩阵乘法。

数学语义

设:

  • M = aMatrix.GetValidRow()
  • K = aMatrix.GetValidCol()
  • N = bMatrix.GetValidCol()

对于 0 <= i < M0 <= j < N

\[ \mathrm{C}_{i,j} = \sum_{k=0}^{K-1} \mathrm{A}_{i,k} \cdot \mathrm{B}_{k,j} + \mathrm{Bias}_{0,j} \]

偏置广播行为由实现定义。

汇编语法

PTO-AS 形式:参见 PTO-AS 规范

同步形式:

%acc = tmatmul.bias %a, %b, %bias : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

AS Level 1(SSA)

%c = pto.tmatmul.bias %a, %b, %bias : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

AS Level 2(DPS)

pto.tmatmul.bias ins(%a, %b, %bias : !pto.tile_buf<...>, !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%c : !pto.tile_buf<...>)

C++ 内建接口

声明于 include/pto/common/pto_instr.hpp

template <typename TileRes, typename TileLeft, typename TileRight, typename TileBias, typename... WaitEvents>
PTO_INST RecordEvent TMATMUL_BIAS(TileRes &cMatrix, TileLeft &aMatrix, TileRight &bMatrix, TileBias &biasData, WaitEvents &... events);

template <AccPhase Phase, typename TileRes, typename TileLeft, typename TileRight, typename TileBias,
          typename... WaitEvents>
PTO_INST RecordEvent TMATMUL_BIAS(TileRes &cMatrix, TileLeft &aMatrix, TileRight &bMatrix, TileBias &biasData, WaitEvents &... events);

约束

  • 所有来自 TMATMUL 的约束都适用于 (cMatrix, aMatrix, bMatrix) 三元组。
  • 偏置约束 (A2A3):
    • TileBias::DType 必须匹配 TileRes::DType
    • TileBias::Loc == TileType::BiasTileBias::Rows == 1
  • 偏置约束 (A5):
    • TileBias::DType 必须匹配 TileRes::DType
    • TileBias::Loc == TileType::BiasTileBias::Rows == 1TileBias::isRowMajor

示例

自动(Auto)

#include <pto/pto-inst.hpp>

using namespace pto;

void example_auto() {
  using A = TileLeft<half, 16, 16>;
  using B = TileRight<half, 16, 16>;
  using Bias = Tile<TileType::Bias, half, 1, 16>;
  using C = TileAcc<float, 16, 16>;
  A a;
  B b;
  Bias bias;
  C c;
  TMATMUL_BIAS(c, a, b, bias);
}

手动(Manual)

#include <pto/pto-inst.hpp>

using namespace pto;

void example_manual() {
  using A = TileLeft<half, 16, 16>;
  using B = TileRight<half, 16, 16>;
  using Bias = Tile<TileType::Bias, half, 1, 16>;
  using C = TileAcc<float, 16, 16>;
  A a;
  B b;
  Bias bias;
  C c;
  TASSIGN(a, 0x1000);
  TASSIGN(b, 0x2000);
  TASSIGN(bias, 0x3000);
  TASSIGN(c, 0x4000);
  TMATMUL_BIAS(c, a, b, bias);
}

汇编示例(ASM)

自动模式

# 自动模式:由编译器/运行时负责资源放置与调度。
%c = pto.tmatmul.bias %a, %b, %bias : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

手动模式

# 手动模式:先显式绑定资源,再发射指令。
# 可选(当该指令包含 tile 操作数时):
# pto.tassign %arg0, @tile(0x1000)
# pto.tassign %arg1, @tile(0x2000)
%c = pto.tmatmul.bias %a, %b, %bias : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>

PTO 汇编形式

%acc = tmatmul.bias %a, %b, %bias : (!pto.tile<...>, !pto.tile<...>, !pto.tile<...>) -> !pto.tile<...>
# AS Level 2 (DPS)
pto.tmatmul.bias ins(%a, %b, %bias : !pto.tile_buf<...>, !pto.tile_buf<...>, !pto.tile_buf<...>) outs(%c : !pto.tile_buf<...>)